Hello, I have two AD forests, domain A and B, both at a Windows Server 2008 R2 domain level. They both have an external trust with each other, Transitive - No. I created a security group in domain B but cannot add users from Domain A to it. Does any one know why? I can add users from Domain A to resources(Computers) in Domain B. Also if I have to change the trust, can I edit it or do I have to recreate? Thank you for your help!

Hello Sysadmin, I recommend you check this checklist once. http://technet.microsoft.com/en-us/library/cc756852%28WS.10%29.aspxRegards, Ravikumar P

Thank you all for your help!